Lawyers for Osama bin Laden’s son-in-law Sulaiman Abu Ghayth said Thursday that they will resort to written questions to interview alleged 9/11 mastermind Khalid Sheik Mohammed as a witness before the accused terrorist’s Feb. 24 Manhattan federal court trial.

The lawyers had sought to visit Guantanamo Bay to interview Mohammed in person but reached a compromise with prosecutors, who opposed the request.

In legal filings last week, Abu Ghayth’s lawyer, Stanley Cohen, said getting access to Mohammed is crucial for Abu Ghayth’s defense, considering Mohammed is widely credited with commissioning “shoe bomber” Richard Reid — and the government alleges Abu Ghayth played a key role in that plot.